Coupling for armored hose



Nov. l5, 1927.

w. A. JOHNSON coUPLtNG FOR ARMORED HosfJ Filed Jan. 2, 1925 Patented Nov. 15, 1927.

UNITED ASTATES PATENT OFFICE.

WILL'IAINIA. JOHNSON, OF CHICAGO, ILLINOIS, ASSIGNOR TO PENNSYLVANIA FLEX- IBLE METALLIC TUBING COMPILNY, `Ol? PHILADELPHIA, PENNSYLVANIA, A CORPO- RATION OF PENNSYLVANIA.

coUPLrne non Ansmann Hose.

Application filed January 2, 19.23. Serial No. 610,238.

Sonie of the objects of the present inven` tion are to provide an improved mechanism for coup-ling the ends of metallic or other armored hose to form a continuous hose which is separableat will at the coupling point; to provide a simple and etl'ectivecoupling device for quickly repairing split or otherwise damaged hose; to provide a device tor attaching a coupling vto the end of a metallic or other armored hose in a iXed leak-'proof manner; to provide means for attaching a coupling to an end of a hose in a manner'to prevent relative move-ment between the parts, either axially or circuinterentially; to provide an improved clamping` mechanism for armored hose; end to provide .other improvements as will hereinafter appear.

In the accompanying drawings, Fig. 1 represents a longitudinal section of a coupling for hose embodying `one -form ot the present invention; Fig. 2 represents a side elevation ot one ot the coupling attaching devices; Fig. 3 represents an axial section of the sa1ne;Fig. /l represents a section on line l--ll ot Fig. 3; and Fig. 5 represents a section on line 5v5 of Fig.` 3 showing the clamping element attached to an end ot an armored flexible hose.

Reierringto the drawings, one form of the present invention comprises a coupling arranged to be removably attached to tliemeeting ends of two sections or lengths ot flexible metallic or armored hose, which is formed in the usual manner of a plurality of interiit-ting convolut-ions ot flexible nietallic tubing 11 encased in a covering l2 of suitable material. In the present construction the coupling 1() consists generally of 40 means for connecting the two ends of the hose together, and means for removably at taching the respective connecting means to the hose. i j

For the purpose of connecting the meeting ends ot two lengths of hose, atype of union is employed which comprises a head 13 formed intermediate its length with a hexagon-shaped flange 14` and oppositely disposed tuhular, exteriorly threaded endpor- 50 tions 15 and 16. The threaded end portion 15 is arranged to be engaged by a nut 17,

which is swivelled in the usual manner upon the tubular union body 18, so that the two parts can be tightly drawn together to :torni` a lcakproot' joint as will be readily understood. j' The body 18 is formed with a hexagon-shaped flange 19 and a threaded end portion 2O on the opposite part of the body from the nut 17. The ianges 14 and 19 serve to receive a wrench or other implement whereby the two parts are held or manipulated while being connected.

As "a means tor attaching1 the respective part-s of the union to the metallic hose, two sleeve clamps 21 and 22 are employed, each ot' which has an internally threaded end por tion 23, in one instance for threaded engagement with the end port-ion 16 of the head 13, and in the other instance for threaded engagement with t-he end portion 20 of the body 18. As these two clamping elements 21 and 22 are ot like construction, the present description will he confined to one, and like reference numerals applied to corresponding parts of the other. Thus taking the sleeve clamp 21, it has an internal diameter suilicient to Vsnugly receive the hose to which it is to be attached, and has its outer o r untljireaded end split at two opposite portions Q-i, the material so removed being of a thickness to provide enough clearance to permit the two end parts of the sleeve to move towards each other to reduce the diam* eter suiiiciently tor rigid clamping purposes.

In order to render the sleeve more readily responsive'to the tlc-Xing action necessary for proper clamping, openings 25 are cut in the respective sides of the sleeve adjacent to and communicating with the split portions on the inner ends thereof` while recesses 26 form a continuation of the respective split porti-ons at the other ends thereof and these recesses enlarge respectively to the end of the sleeve. In addition the inner diameter of the sleeve, Jfrom a point approximately opposite the split portions, is outwardly tapered, as shown at 27. to the hose receiving` end ot the sleeve. The foregoing construction gives the desired clamping movement without weakening the walls or otherwise i1npairing the proper functioning of the sleeve.

For the purpose of producing the desired clamping action, the opposed walls of each splity portion ot the sleeve are formed with juxtaposed lugs 28 and 29, each suchpair of lugs having a threaded hole 30 in one lug- 28 and a counterbored hole 31 in the` other lug 29, such holes being alined to receive a clamping screw 32. By tightening the screws 32 the split end portions of the sleeve are drawn together" to reduce the inner diameter and thus rigidly bind the sleeve upon the hose.

To prevent movement axially between the sleeve and the hose, the inner circumference of the sleeve is provided with one or more ribs 33, the depth and width of which conform approximately to the same dimensions as the space" formed between the helical convolutionsof the metallictubinff. As here shown the sleeves 21 and 22 are each provided with two such ribs arranged at opposite side portions of the inner circumference thereof, and preferably these ribs taper towards their ends where they merge into the inner wall of the sleeve. lhus when a sleeve is assembled uponits hose end, the rib or ribs 33 thereon are forced into interlocking relation with the hose bycompressing the covering 12 into the space between theconvolntions of the metal armor 11.

' In the present construction the flexible metallic arn'ior 11 is covered with a fabric 12 comprising an inner casing 34: of rubber and an outer casing 35 of woven fabric, such being the general type of coverings in use at the present time for hose of this character. It is to be understood, however, that this construction is .only shown by way of eX- ample and that the coupling of the present invention is applicable to various forms of hose for uniting sections thereof. j

As a means for forming a lealcproof joint between the end of the hose and the interfitting part of the union, either part 13 or part 18, each of these parts is provided with a groove 3G in the face abutting thehose for the purpose of forming a pocket to receive a washer 37, when the latter is placed under compression bythe clamping action` of the coupling. j

'ln attaching the respective parts of the coupling, the two sleeves 2l and 22 are respectively clamped to the ends of the two lengths of hose. This is accomplished by insertingl the hose into the sleeve until the end abuts the thread 23, whereupon the screws arc'tightened. `This causes the split end portions of the sleeve to be drawn towards each other to fforce the ribs'33 against the covering `L2 and compress a circumferential section of the fabric into the space between two convolutions of the metal armor. Thus the sleeve is not only clamped rigidly against relative turning movement but is likewise held against movement aniallj of the hose'. The washer 37 for that end is then placed in the sleeve to abut. the end of the hose, and the co-operatingpart of the" union, say 13, is screwed into the sleeve j and forcibly actuated to compress the washer 37 between the opposed ends of the part 13 and the hose and into the face groove 3G to thereby forma lealoprool joint.

From the foregoing it will be apparent that a complete unitary attachment for coupling armored flexible hose, of the kind employed for conducting liquids such Yfor eX- ample as flexible hose for gasoline pumps or any other purpose, has been devised, and that it is simple and effective and provides a leak-proof construction. Generally hose of this character is subjected to severe strains at the points where it is connected to a rigid part and in consequence splits or breaks at such a junction point. When this happens it is the usual practice to send the broken or damaged hose to a repair place to have a new coupling or other rigid attachment applied, and therefore the particular device with which the hose was used is temporarily put out of commission. By the present invention such delays and expense of repairs are eliminated because the most unskilled workmen can quickly remove the two attaching sleeves, or only one if necessary, by merely loosening the screws 32, and then cutting olf the damaged part of the hose, after which the sleeves can be put upon the new ends and the hose is again ready for use. attachingl means as used with a coupling for two ends of" hose, it will be understood that but one sleeve can be used if desired to form a connection for a nozzle or any other part to be connected to one end of a length of hose.

Having now fully described my invention, what I claim is 1. A coupling comprising a sleeve arranged to receive an end of a length of armored hose formed of spiral convolutions and having a flexible covering, said sleeve having a split portion at one end, means at the other end of said sleeve for attaching said sleeve to a cooperating' part, clamping means for drawing the split portions together to grip said hose, and an internal rib on said split portions and integral therewith forcecfl by said clamping means .into said hose transverse to said convolutions to interlock said sleeve and said hose.

2. A coupling comprising a `sleeve arranged to receive an end of a length of flexible armored hose having aI flexible cover, means at one end of said sleevefor attaching said sleeve to a cci-operating part, clamping means at the other end of said sleeve for causing said sleeve to grip said hose, and a rib formed on the inner circumference of said sleeve all points of said rib lying in the saine transverse plane, said rib being arranged to be forced across convolutions of said hose in binding engagenient with said cover to prevent axial relative movement.

While the present showing discloses the l lill 3. A hose coupling comprising a split armored hose, and a gasket in said space sleeve internally threaded at its coupling end abutting the said adjacent ends and Which is 10 and clamped to the terminal end of an inadapted to be compressed by the engagement teriorly armored hose and extending thereof the coupling and split sleeves.

l beyond, a coupling sleeve exteriorly thlead- Signed at Chicago, county of Cook, State ed to engage the `threads of the split sleeve oi' llinois, this Q6 day of December, 1922.

so as to provide a space between the adjacent ends of said coupling sleeve and WILLIAM A. JOHNSON. 

